

For reference a Tubolito Tubo with 42mm valve stem measures 41g on my scale.

On first impressions I'd say the plastic feels very similar to my Tubo, but the valve stem is maybe a slightly better plastic, and black is definitely a bonus if you plan to use them as more than just a spare. Inflates just fine, left it up for a few days and no obvious leaks, though I've not ridden with it yet. Building a new bike at the moment so will probably try it for a bit and see how it goes.
I couldn't find any other mention of these on the forum so if anyone knows more about them then I'm all ears. As far as I know most/all of the other TPU tubes are made in Europe.
And for the avoidance of doubt, I am in absolutely now way affiliated with this product! Just thought this community might be interested.